PBS KIDS

At the Plum Landing website, kids can play ecology games and explore exotic ecosystems. Plum also encourages kids to investigate their own worlds — why veg out on the couch when you can be outside doing something fabulous?

WGBH KIDS

Angelina, Vici and Gracie have a sleepover the night before the Silly Hat Carnival, but stay up too late and then oversleep, causing them to miss an important ballet rehearsal; Ms. Mimi cancels lunchtime rehearsals.